如何通過路徑在活動之間發送圖像android

Question

我嘗試通過路徑將圖像發送到其他活動。沒有錯誤，但圖像不可見。我認爲這可能是發送路徑的問題，但我不知道。該圖像在目錄中可繪製。

感謝您的幫助

這是我的第一個活動：

public void onClickObamaBtn(View v){ 

    Intent intent = new Intent(this, EkranB.class); 
    String path = getString(R.drawable.obama); 
    Toast.makeText(this, path, Toast.LENGTH_LONG).show(); 
    intent.putExtra("president", path); 
    startActivity(intent); 
} 

螞蟻，這是第二個：

protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_ekran_b); 

    ivObama = (ImageView) findViewById(R.id.iV1); 
    preferences = this.getSharedPreferences("prezydenciUsa", Context.MODE_PRIVATE); 

    String path = getIntent().getStringExtra("president"); 
    Drawable president = Drawable.createFromPath(path);  

    ivObama.setImageDrawable(president); 

} 

Answer 1

你的意思的路徑是在Drawable的Resource，它是Resource id的int

您可以直接從Resource設置圖像這樣

imageView.setImageDrawable(getResources().getDrawable(R.id.obama)); 

我不明白，爲什麼你需要通過Resource id，因爲資源是所有Activity

訪問如果你真的需要通過通過意圖被拉伸，然後做這樣

int pathId = getResources().getDrawable(R.id.obama); 
intent.putExtra("president", pathId); 

現在，獲取資源ID，並將其設置爲ImageView這樣

int pathId = getIntent().getIntExtra("president", -1); 
imageView.setImageDrawable(pathId); 

Answer 2

in this case its better to pass integer value which you will get from first activity as follow 

public void onClickObamaBtn(View v){ 

    Intent intent = new Intent(this, EkranB.class); 
    int path = R.drawable.obama; 
    Toast.makeText(this, ""+path, Toast.LENGTH_LONG).show(); 
    intent.putExtra("president", path); 
    startActivity(intent); 
} 

protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_ekran_b); 

    ivObama = (ImageView) findViewById(R.id.iV1); 
    preferences = this.getSharedPreferences("prezydenciUsa", Context.MODE_PRIVATE); 

    int path = getIntent().getIntExtra("president",0); 


    ivObama.setImageDrawable(getResources().getDrawable(path)); 

}