正确代码 = =-白红宇

正确代码 = =

阅读量：4525 次

发布时间：2019-06-08

本文共 13013 字，大约阅读时间需要 43 分钟。

1.Testactivity1.java

1 package com.hanqi.myapplication;  2   3 import android.app.Activity;  4 import android.content.Intent;  5 import android.os.Bundle;  6 import android.util.Log;  7 import android.view.View;  8 import android.widget.EditText;  9 import android.widget.Toast; 10  11 //1.继承Activity 12 /** 13  * Created by lenovo on 2016/4/22. 14  */ 15 public class TestActivity1 extends Activity { 16  17     //成员变量 18     EditText et1; 19     EditText et2; 20     EditText et3; 21     //2.重写onCreate(),关联Layout文件 22     //onCreate()是一个回调方法：在满足特定条件下自动调用的方法；方法名一般on开头 23  24     @Override 25     protected void onCreate(Bundle savedInstanceState) { 26         super.onCreate(savedInstanceState); 27  28         //关联 29         setContentView(R.layout.message_relativelayout); 30         //初始化工作 31         //获取Layout文件中定义的组件 32  33         et1=(EditText)findViewById(R.id.et1); 34         et2=(EditText)findViewById(R.id.et2); 35         et3=(EditText)findViewById(R.id.et3); 36         Log.e("TAG","onCreat()被调用"); 37  38         //得到意图 39         Intent intent = getIntent(); 40         String strname = intent.getStringExtra("name"); 41         String strname1 = intent.getStringExtra("name1"); 42         //intent.getExtras(); 43         Log.e("TAG","意图传递的数据="+strname); 44         Log.e("TAG","意图传递的数据1="+strname1); 45 //        if(savedInstanceState!=null&&!savedInstanceState.isEmpty()) 46 //        { 47 //        et1.setText(savedInstanceState.getString("et1")+"恢复之后的"); 48 //        et2.setText(savedInstanceState.getString("et2")); 49 //        et3.setText(savedInstanceState.getString("et3")); 50 //        } 51     } 52  53     //保存状态 54     @Override 55     protected void onSaveInstanceState(Bundle outState) { 56         super.onSaveInstanceState(outState); 57         Log.e("TAG", "保存应用状态"); 58  59         outState.putString("et1", et1.getText().toString()); 60         outState.putString("et1",et2.getText().toString()); 61         outState.putString("et1",et3.getText().toString()); 62     } 63  64     //恢复状态 65     @Override 66     protected void onRestoreInstanceState(Bundle savedInstanceState) { 67         super.onRestoreInstanceState(savedInstanceState); 68         Log.e("TAG", "恢复应用状态"); 69  70         et1.setText(savedInstanceState.getString("et1")); 71         et2.setText(savedInstanceState.getString("et2")); 72         et3.setText(savedInstanceState.getString("et3")); 73  74     } 75  76     //启动 77     @Override 78     protected void onStart() { 79         super.onStart(); 80         Log.e("TAG","onStart()被调用"); 81     } 82     //重启 83     @Override 84     protected void onRestart() { 85         super.onRestart(); 86         Log.e("TAG", "onRestart()被调用"); 87     } 88     //继续 89     @Override 90     protected void onResume() { 91         super.onResume(); 92         Log.e("TAG", "onResume()被调用"); 93     } 94     //暂停 95     @Override 96     protected void onPause() { 97         super.onPause(); 98         Log.e("TAG", "onPause()被调用"); 99     }100     //停止101     @Override102     protected void onStop() {103         super.onStop();104         Log.e("TAG", "onStop()被调用");105     }106     //销毁107     @Override108     protected void onDestroy() {109         super.onDestroy();110         Log.e("TAG", "onDestroy()被调用");111     }112     //点击事件方法113     public void bt_OnClick(View v)114     {115         //显示提示信息116         //方法链117         Toast.makeText(TestActivity1.this, "消息发送成功", Toast.LENGTH_SHORT).show();118     }119     public void close_OnClick(View v)120     {121         //关闭应用122         finish();123     }124 }

2.MainActivity.java

1 package com.hanqi.myapplication; 2  3 import android.content.ComponentName; 4 import android.content.Intent; 5 import android.net.Uri; 6 import android.os.Bundle; 7 import android.support.v7.app.AppCompatActivity; 8 import android.util.Log; 9 import android.view.View;10 import android.widget.Button;11 12 public class MainActivity extends AppCompatActivity {13 14     //回调方法 （on开头的方法都是）15     //在创建时自动调用16     @Override17     protected void onCreate(Bundle savedInstanceState) {18         //调用父类的回调方法19         super.onCreate(savedInstanceState);20         //设置内容视图文件21         //建立Activity和Layout文件之间的关联22         setContentView(R.layout.test_linearlayout);23         //1.获得这个组件24         Button bt2 =  (Button)findViewById(R.id.button2);25         //2.操作这个组件26         // bt2.setText("新按钮");27         //日志输出28         System.out.print("日志输出=应用开始运行");29         Log.v("HANQI", "Verbose级别的日志信息");30         Log.d("HANQI", "Debug级别的日志信息");31         Log.i("HANQI", "Info级别的日志信息");32         Log.w("HANQI", "Warning级别的日志信息");33         Log.e("HANQI", "Error级别的日志信息");34     }35     public void login_onClick(View v)36     {37         //打开新的Activity38         //1.创建意图  显式意图39         Intent intent = new Intent();40         //定义显式意图41         ComponentName componentName = new ComponentName(this,TestActivity1.class);42         intent.setComponent(componentName);43         intent.putExtra("name", "意图传递的值");44         intent.putExtra("name1", "意图传递的值1");45 46         //2.发起意图47         startActivity(intent);48     }49     public void bt2_onClick(View v)50     {51         //发起隐式意图52         //打开拨打电话的界面53         //系统已经预先定义了常用功能的Action的字符串常量54         Intent intent2 = new Intent(Intent.ACTION_CALL);55         //intent2.setAction(Intent.ACTION_DIAL);56 57         //构造Uri58         Uri uri = Uri.parse("tel:110");59 60         //intent2.addCategory("");61 62         //设置data63         intent2.setData(uri);64 65         //intent2.setType("");66         //intent2.setDataAndType(uri,"");67 68         try69         {70             startActivity(intent2);71         }72         catch (Exception e){73             e.printStackTrace();74         }75     }76 77     public void bt3_onClick(View v)78     {79         //返回桌面80         Intent intent3 = new Intent(Intent.ACTION_MAIN);81 82         intent3.addCategory(Intent.CATEGORY_HOME);83 84         startActivity(intent3);85     }86     public void bt4_onClick(View v)87     {88         //定义隐式意图89         Intent intent4 = new Intent("com.hanqi.action.test1");90         //如果不主动添加Category，默认给Category加上"android.intent.category.DEFAULT"91         //主动添加Category92         intent4.addCategory("com.hanqi.category.test1");93         startActivity(intent4);94     }95 }

3.Android Mani fest.xml

1 package com.hanqi.myapplication; 2  3 import android.content.ComponentName; 4 import android.content.Intent; 5 import android.net.Uri; 6 import android.os.Bundle; 7 import android.support.v7.app.AppCompatActivity; 8 import android.util.Log; 9 import android.view.View;10 import android.widget.Button;11 12 public class MainActivity extends AppCompatActivity {13 14     //回调方法 （on开头的方法都是）15     //在创建时自动调用16     @Override17     protected void onCreate(Bundle savedInstanceState) {18         //调用父类的回调方法19         super.onCreate(savedInstanceState);20         //设置内容视图文件21         //建立Activity和Layout文件之间的关联22         setContentView(R.layout.test_linearlayout);23         //1.获得这个组件24         Button bt2 =  (Button)findViewById(R.id.button2);25         //2.操作这个组件26         // bt2.setText("新按钮");27         //日志输出28         System.out.print("日志输出=应用开始运行");29         Log.v("HANQI", "Verbose级别的日志信息");30         Log.d("HANQI", "Debug级别的日志信息");31         Log.i("HANQI", "Info级别的日志信息");32         Log.w("HANQI", "Warning级别的日志信息");33         Log.e("HANQI", "Error级别的日志信息");34     }35     public void login_onClick(View v)36     {37         //打开新的Activity38         //1.创建意图  显式意图39         Intent intent = new Intent();40         //定义显式意图41         ComponentName componentName = new ComponentName(this,TestActivity1.class);42         intent.setComponent(componentName);43         intent.putExtra("name", "意图传递的值");44         intent.putExtra("name1", "意图传递的值1");45 46         //2.发起意图47         startActivity(intent);48     }49     public void bt2_onClick(View v)50     {51         //发起隐式意图52         //打开拨打电话的界面53         //系统已经预先定义了常用功能的Action的字符串常量54         Intent intent2 = new Intent(Intent.ACTION_CALL);55         //intent2.setAction(Intent.ACTION_DIAL);56 57         //构造Uri58         Uri uri = Uri.parse("tel:110");59 60         //intent2.addCategory("");61 62         //设置data63         intent2.setData(uri);64 65         //intent2.setType("");66         //intent2.setDataAndType(uri,"");67 68         try69         {70             startActivity(intent2);71         }72         catch (Exception e){73             e.printStackTrace();74         }75     }76 77     public void bt3_onClick(View v)78     {79         //返回桌面80         Intent intent3 = new Intent(Intent.ACTION_MAIN);81 82         intent3.addCategory(Intent.CATEGORY_HOME);83 84         startActivity(intent3);85     }86     public void bt4_onClick(View v)87     {88         //定义隐式意图89         Intent intent4 = new Intent("com.hanqi.action.test1");90         //如果不主动添加Category，默认给Category加上"android.intent.category.DEFAULT"91         //主动添加Category92         intent4.addCategory("com.hanqi.category.test1");93         startActivity(intent4);94     }95 }

4.Test linearlayout.xml

5.TestAcivity2.java

1 package com.hanqi.myapplication;  2   3 import android.app.Activity;  4 import android.content.Intent;  5 import android.os.Bundle;  6 import android.util.Log;  7 import android.view.View;  8 import android.widget.EditText;  9 import android.widget.Toast; 10  11 //1.继承Activity 12  13 /** 14  * Created by lenovo on 2016/4/22. 15  */ 16 public class TestActivity2 extends Activity{ 17  18     //成员变量 19     EditText et1; 20     EditText et2; 21     EditText et3; 22     //2.重写onCreate(),关联Layout文件 23     //onCreate()是一个回调方法：在满足特定条件下自动调用的方法；方法名一般on开头 24  25     @Override 26     protected void onCreate(Bundle savedInstanceState) { 27         super.onCreate(savedInstanceState); 28  29         //关联 30         setContentView(R.layout.message_relativelayout); 31         //初始化工作 32         //获取Layout文件中定义的组件 33  34         et1=(EditText)findViewById(R.id.et1); 35         et2=(EditText)findViewById(R.id.et2); 36         et3=(EditText)findViewById(R.id.et3); 37         Log.e("TAG","onCreat()被调用"); 38  39         //得到意图 40         Intent intent = getIntent(); 41         String strname = intent.getStringExtra("name"); 42         String strname1 = intent.getStringExtra("name1"); 43         //intent.getExtras(); 44         Log.e("TAG","意图传递的数据="+strname); 45         Log.e("TAG","意图传递的数据1="+strname1); 46 //        if(savedInstanceState!=null&&!savedInstanceState.isEmpty()) 47 //        { 48 //        et1.setText(savedInstanceState.getString("et1")+"恢复之后的"); 49 //        et2.setText(savedInstanceState.getString("et2")); 50 //        et3.setText(savedInstanceState.getString("et3")); 51 //        } 52     } 53  54     //保存状态 55     @Override 56     protected void onSaveInstanceState(Bundle outState) { 57         super.onSaveInstanceState(outState); 58         Log.e("TAG", "保存应用状态"); 59  60         outState.putString("et1", et1.getText().toString()); 61         outState.putString("et1",et2.getText().toString()); 62         outState.putString("et1",et3.getText().toString()); 63     } 64  65     //恢复状态 66     @Override 67     protected void onRestoreInstanceState(Bundle savedInstanceState) { 68         super.onRestoreInstanceState(savedInstanceState); 69         Log.e("TAG", "恢复应用状态"); 70  71         et1.setText(savedInstanceState.getString("et1")+"恢复之后的"); 72         et2.setText(savedInstanceState.getString("et2")); 73         et3.setText(savedInstanceState.getString("et3")); 74  75     } 76  77     //启动 78     @Override 79     protected void onStart() { 80         super.onStart(); 81         Log.e("TAG","onStart()被调用"); 82     } 83     //重启 84     @Override 85     protected void onRestart() { 86         super.onRestart(); 87         Log.e("TAG", "onRestart()被调用"); 88     } 89     //继续 90     @Override 91     protected void onResume() { 92         super.onResume(); 93         Log.e("TAG", "onResume()被调用"); 94     } 95     //暂停 96     @Override 97     protected void onPause() { 98         super.onPause(); 99         Log.e("TAG", "onPause()被调用");100     }101     //停止102     @Override103     protected void onStop() {104         super.onStop();105         Log.e("TAG", "onStop()被调用");106     }107     //销毁108     @Override109     protected void onDestroy() {110         super.onDestroy();111         Log.e("TAG", "onDestroy()被调用");112     }113     //点击事件方法114     public void bt_OnClick(View v)115     {116         //显示提示信息117         //方法链118         Toast.makeText(TestActivity2.this, "消息发送成功", Toast.LENGTH_SHORT).show();119     }120     public void close_OnClick(View v)121     {122         //关闭应用123         finish();124     }125 }

转载于:https://www.cnblogs.com/TENOKAWA/p/5434797.html

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