android-intent隐式跳转

android-intent隐式跳转

  1. 首先两个界面第一个界面有两个EditText用于输入账号密码，还有两个Button用于登陆和取消
    第二个界面是两个TextView用于显示第一个界面传过来的账号密码。
  1. 在Manifest.xml中显示
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    <manifest xmlns:android="http://schemas.android.com/apk/res/android"
        package="com.example.firstintent"
        android:versionCode="1"
        android:versionName="1.0" >
        <uses-sdk
            android:minSdkVersion="14"
            android:targetSdkVersion="21" />
        <application
            android:allowBackup="true"
            android:icon="@drawable/ic_launcher"
            android:label="@string/app_name"
            android:theme="@style/AppTheme" >
            <activity 
                android:name=".MainActivity"
                android:label="@string/app_name" >
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />
                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>
            </activity>
            <activity
                android:name=".SecondActivity"
                android:label="@string/title_activity_second" >
                <intent-filter>
                    <action android:name="android.intent.action.Second"/>
                    <category android:name="android.intent.category.DEFAULT"/>
                </intent-filter>
            </activity>
        </application>

    </manifest>
  2. MainActivity.java
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    import android.os.Bundle;
    import android.app.Activity;
    import android.content.Intent;
    import android.view.View;
    import android.view.View.OnClickListener;
    import android.widget.Button;
    import android.widget.EditText;
    import android.widget.Toast;
    import android.view.Menu;
    public class MainActivity extends Activity {
    	Button bt1;
    	Button bt2;
    	EditText et1;
    	EditText et2;
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		bt1 = (Button)findViewById(R.id.button1);
    		bt2 = (Button)findViewById(R.id.button2);
    		et1 = (EditText)findViewById(R.id.editText1);
    		et2 = (EditText)findViewById(R.id.editText2);
    		final String username = et1.getText().toString();
    		final String password = et2.getText().toString();
    		bt1.setOnClickListener(new OnClickListener() {
    			@Override//设置侦听
    			public void onClick(View v) {
    				Intent intent = new Intent("android.intent.action.Second");
    				if((username.equals("admin"))&&(password.equals("123"))){
    					intent.putExtra("name", username);
    					intent.putExtra("pwd", password);
    					startActivity(intent);
    				}else{//弹出密码错误
    					Toast.makeText(getApplicationContext(), "账号密码输入错误", Toast.LENGTH_SHORT).show();
    				}
    			}
    		});
    		bt2.setOnClickListener(new OnClickListener() {
    			@Override
    			public void onClick(View arg0) {
    				Toast.makeText(getApplication(), "登陆已取消", Toast.LENGTH_SHORT ).show();
    			}
    		});
    	}
    	@Override
    	public boolean onCreateOptionsMenu(Menu menu) {
    		getMenuInflater().inflate(R.menu.main, menu);
    		return true;
    	}
    }
  3. SecondActivity.java
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    import android.os.Bundle;
    import android.app.Activity;
    import android.content.Intent;
    import android.view.Menu;
    import android.widget.TextView;

    public class SecondActivity extends Activity {
    	TextView tv1;
    	TextView tv2;
    	@Override
    	protected void onCreate(Bundle savedInstanceState) {
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_second);
    		tv1 = (TextView)findViewById(R.id.view1);
    		tv2 = (TextView)findViewById(R.id.view2);
    		Intent intent = this.getIntent();
    		tv1.setText(intent.getStringExtra("name"));
    		tv2.setText(intent.getStringExtra("pwd"));
    	}
    	@Override
    	public boolean onCreateOptionsMenu(Menu menu) {
    		getMenuInflater().inflate(R.menu.second, menu);
    		return true;
    	}

    }