本文共 4887 字,大约阅读时间需要 16 分钟。
second.xml
MainActivity.java
package com.android.test.activity; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity { private Button btn; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btn = (Button)findViewById(R.id.btn); //响应按钮btn事件 btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //显示方式声明Intent,直接启动SecondActivity Intent it = new Intent(MainActivity.this,SecondActivity.class); //启动Activity startActivity(it); } }); } }SecondActivity.java
package com.android.test.activity; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class SecondActivity extends Activity { private Button secondBtn; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.second); secondBtn=(Button)findViewById(R.id.secondBtn); //响应按钮secondBtn事件 secondBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { //显示方式声明Intent,直接启动MainActivity Intent intent = new Intent(SecondActivity.this,MainActivity.class); //启动Activity startActivity(intent); } }); } }AndroidManifest.xml清单文件,16~18行为SecondActivity在清单文件里的声明
MainActivity.java
package com.android.change.activity; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class MainActivity extends Activity { private Button btn; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); btn = (Button) findViewById(R.id.btn); // 响应按钮btn事件 btn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // 实例化Intent Intent it = new Intent(); //设置Intent的Action属性 it.setAction("com.android.activity.MY_ACTION"); // 启动Activity startActivity(it); } }); } }SecondActivity.java
package com.android.change.activity; import android.app.Activity; import android.os.Bundle; public class SecondActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.second); } }main.xml
seond.xml
AndroidManifest.xml文件的18,19行修改了Intent Filter,这样SecondActivity才能够接收到MainActivity发送的Intent。因为在MainActivity的Intent发送的动作为"com.android.activity.MY_ACTION",而在18行里,SecondActivity设置的Action也为"com.android.activity.MY_ACTION",这样就能进行匹配。
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