android activity跳转

开始Activity代码：

Intent in = new Intent();
in.putExtra("str", "欢迎测试");//
in.setClass(TestActivity02Activity.this, TestActivtiy03.class);
TestActivity02Activity.this.startActivity(in);

必须配置AndroidManifest.xml代码：

<activity
            android:name=".TestActivity02Activity"
            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=".TestActivtiy03" android:label="测试"></activity>//跳转到的activity在xml注册

跳转到的activity取值：

Intent in =getIntent();
        String str = in.getStringExtra("str");
        Toast.makeText(TestActivtiy03.this,"提示:"+str,Toast.LENGTH_LONG).show();